Possibly a 225 65 R 16. However you should have good reasons for changing.
A 225 75R 16 tire will fit on a 245 75R 16 rim. The only difference between the tires is the height of the sidewall.
No, how would they fit the rim.
it will fit but the tire is wider and is taller in diameter. Your speedometer will be off.
On a 2001 Toyota Highlander
Without knowing the width of the wheel this is impossible to answer.
NO, the rim sizes are different, you can NOT fit a 15" tire on a 16" rim.
Yes, you can do it.
Yes, they will fit.
what is the diameter difference from a 205/65/16 vs. 225/60/16
NO , rim size is incorrect.
225/65/r16
Yes, if you also change wheels.